The centre crops don't change the conclusions much, although I'd note that the sharpness in the centre crop for the 16mm was a bit suprising. Of course, it loses a lot of that sharpness in the corner.

thanks for the update, i am a bit surprising that the 10-18 is doing quite a bit worse than the 16mm one on first image, but at 12mm image 10-18 is much better than 16mm with UWA (also can notice some distortion caused quite a bit problem in image when it got UWA).